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My P4 640 3.2ghz is running at 2800mhz...WHY ???

post #1 of 5
Thread Starter 
Hi guys,

Another post.

My 3.2ghz p4 640 running idle at 2.8ghz, check the cpu-z below.

I turned off Intel Step Speed and its still coming out as 2.8ghz. Can someone let me know what the problem might be, if any? Also, my specs are below, incase you need to know. Thanks

My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
640 Prescott 3.2 @ 4ghz Asus P5WD2 Premium 7900 GT KO @ 550/800 2gb Corsair XMS2 5400ddr2 
Hard DriveOSMonitorKeyboard
2x36 Raptors / 1 WD 250gb Windows XP Pro - SP2 Dell P1130 - 21" CRT Microsoft KeyBoard 
PowerCaseMouse
Antec True Power 2.0 550w Sunbeam Transformer Logitech MX-518 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
640 Prescott 3.2 @ 4ghz Asus P5WD2 Premium 7900 GT KO @ 550/800 2gb Corsair XMS2 5400ddr2 
Hard DriveOSMonitorKeyboard
2x36 Raptors / 1 WD 250gb Windows XP Pro - SP2 Dell P1130 - 21" CRT Microsoft KeyBoard 
PowerCaseMouse
Antec True Power 2.0 550w Sunbeam Transformer Logitech MX-518 
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post #2 of 5
Is cool and quiet enabled in bios? Are you positve that its 3.2? Go into bios and raise the FSB to be 3.2 and leave the vcore voltage alone. You have a nice computer there, start overclocking. You also might want to do a bios update.
post #3 of 5
In addition to SpeedStep, the 6XX series allows you to drop the multiplier from stock (in your case 16) to 14. This allows you to squeeze more out of your RAM while overclocking. Go into your BIOS and adjust the multiplier back up to 16 while you're at stock. Or, since you have decent RAM, leave it at 14 and overclock things further.
Sig rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
Hard DriveOptical DriveOSMonitor
2x250 GB Seagate RAID 0 + 320 GB Seagate Samsung SATA DVD Windows XP Pro/Vista Ultimate 64 bit Viewsonic VA2012wb 
KeyboardPowerCaseMouse
Saitek Eclipse Corsair HX620 Lian Li V2000b Logitech G7 
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Sig rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
Hard DriveOptical DriveOSMonitor
2x250 GB Seagate RAID 0 + 320 GB Seagate Samsung SATA DVD Windows XP Pro/Vista Ultimate 64 bit Viewsonic VA2012wb 
KeyboardPowerCaseMouse
Saitek Eclipse Corsair HX620 Lian Li V2000b Logitech G7 
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post #4 of 5
^^Exactly, the reason is right there on the screen shot. Just change the multiplier back to 16x and that will give you 3200Mhz(200x16); although you would get better performance if you set the FSB to around 230Mhz(230x14=3220Mhz). Just make sure that your PCI/PCI-E bus speeds are locked to 33/100Mhz.
Oh, and you should be able to set the FSB up to around 260-270 and up; most 5XX-6XX processors can overclock 700-1000Mhz on air(I got 800Mhz oc on stock HSF).
post #5 of 5
How did you disable Intel SpeedStep Technology?

There are two ways to do this, the first is to disable it in the BIOS (make sure you save the settings).

The other way is inside the Windows Interface, this is in the power options propeties section of the Control Panel.
The Power Scheme will be different here to the standard none SpeedStep one. Change the Power Scheme to Home/Office desk to disable SpeedStep inside Windows.

If CPU-Z is reading your voltage correctly SpeedStep is still active as the voltage is below what it should be at stock settings, ~1.385v ± 0.03v

SpeedStep information: The version of Intel's SpeedStep Technology that is used on the Pentium 4/M etc is Intel's third generation design.
It has the ability to do these 3 main things (there are others):
  • Reduce CPU voltage
  • Reduce the CPU multiplier
  • Change battery settings
All three of these things are incorporated into the design as well as others, I find these to be the main ones however.
On Pentium 4 processors with the technology onboard it will reduce the CPU multiplier down to x14, for the Pentium M it can change to a number of different values (x6 on my PM 1.6).
Voltage can be reduced a fair amount depending on the clock speed of the CPU and the most stable voltage for the speed. As this is a desktop system the battery life settings are not relevant

If you notice any of those two on your system you know it is operating.
Note: SpeedStep if refered to as EIST, Enhanced Intel SpeedStep Technology and is owned my Intel.
AMD has a varient of this technology called AMD PowerNow.
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